CN2338519Y - Ventilation and heat radiation fan - Google Patents

Abstract

The utility model provides a ventilating and heat radiating fan with low noise and high efficiency, which comprises a base (10) in which a shaft core (12) is fixedly arranged, a fan blade body (11) which is pivoted on the shaft core (12) by a bearing and is provided with a concave part (13), an annular rotor (14) fixedly arranged in the concave part (13) of the fan blade body (11), a stator (15) which is arranged in the annular rotor (14), is fixed on the base (10) and is separated from the bearing (17) and a circuit board (16) which is fixedly arranged in the base and can control the operation of the fan blade body (11) so as to achieve the efficiency of increasing the air quantity and the heat radiating efficiency of the ventilating and heat radiating fan, and in addition, the front end (19) of the fan blade body (11) can also form a circular-arc shape.

Description

Radiation fan

The utility model relates to a kind of radiation fan, and particularly a kind of air quantity that increases improves radiating efficiency, and reduces the axial-flow type radiator fan of noise.

Progress along with science and technology, computer operation speed is more and more faster, but the temperature that is produced in the host computer has also improved many, therefore, generally in host computer, all be provided with suitable radiation fan, in order to assisting heat radiation, the utility model radiation fan is applicable to the main frame inside of laptop etc.

All be provided with a stator (coil) and a rotor in its base of existing radiation fan, its stator is fixedly arranged on the base, and rotor then is fixedly arranged on the flabellum body, and flabellum body is hubbed at base inside with bearing, but the running of mat circuit controlling and driving flabellum body.Because bearing and stator are inside and outside sheathed one, thus take more height, extra small low thin but laptop now is particular about, so the height of the height of host computer and radiation fan is subjected to certain restriction.If bearing and stator have taken more height, the blade area of relative flabellum body will be restricted, and promptly only can adopt less area.The air quantity that blade produced of small size is also less, and radiating efficiency is also relatively poor.Moreover the noise that general its flabellum of axial-flow type radiator fan produces when rotating is bigger.

Main purpose of the present utility model provides a kind of radiation fan that can overcome above-mentioned defective, makes it to have the characteristics of low noise efficient rate.

For achieving the above object, the utility model provides a kind of radiation fan, and this fan comprises: a base, its inside are installed with an axle core; A flabellum body, it is hubbed at the inside of base, and this flabellum body is hubbed on the core with bearing, and flabellum body has a reentrant part; A ring-shaped rotor, it is fixedly arranged in the reentrant part of flabellum body; A stator, it is arranged in the ring-shaped rotor, and this stator is fixed on the base, and separates setting with bearing; With a circuit board, it is fixedly arranged in the base, and is connected with stator.

For further reducing noise, in radiation fan of the present utility model, the front end of described flabellum body is circular arc.

Now the embodiment shown in conjunction with the accompanying drawings describes structure of the present utility model and function in detail.Wherein:

Fig. 1 is a three-dimensional combination figure of the present utility model;

Fig. 2 is a three-dimensional exploded view of the present utility model;

Fig. 3 is a section plan of the present utility model;

Fig. 4 is a user mode schematic representation of the present utility model;

Fig. 5 is a performance diagram of the present utility model;

Fig. 6 is the performance diagram of existing radiation fan;

Fig. 7 is another embodiment's of the utility model a three-dimensional combination figure;

Fig. 8 is another embodiment's of the utility model a three-dimensional exploded view;

Fig. 9 is another embodiment's of the utility model a section plan.

Each label is in the drawings represented respectively:

12 cores of 10 bases, 11 flabellum bodies, 13 reentrant part, 14 ring-shaped rotors

15 stators, 16 circuit boards, 17 bearings, 18 blades, 19 front ends, 20 host computers

As shown in Figures 1 to 3, axial-flow type radiator fan of the present utility model, comprise a base 10 that is hollow shape, a flabellum body 11 is hubbed at the inside of this base 10, flabellum body 11 is hubbed on the axle core 12 that sets firmly in the base 10 with two bearings 17, so that this flabellum body 11 can freely rotate in base 10, flabellum body 11 has a reentrant part 13, suitably set firmly a ring-shaped rotor 14 of making by permanent magnet in this reentrant part 13, this ring-shaped rotor 14 is a rotatable member, be provided with a stator (coil) 15 in the ring-shaped rotor 14, this stator 15 is a fixed element, and it suitably is fixed in the base 10, be installed with a circuit board 16 in the base 10 in addition, this circuit board 16 is adjacent with stator 15, and connects with suitable circuit, can be by the running of circuit controlling and driving flabellum body 11.

As shown in Figure 4, the utility model can be installed in main frame 20 inside of computers such as laptop, in order to assist heat radiation.The utility model mainly is that the stator 15 with base 10 inside one in front and one in back separates setting with bearing 17, but not as existing inside and outside sheathed one, so the utility model can reduce the shared height of stator 15 and bearing 17, under the certain condition restriction of radiation fan height A, can make blade 18 areas of flabellum body 11 increase many.

Because the increase of blade 18 areas, as shown in Figure 5 and Figure 6, the utility model can produce bigger air quantity by more existing radiation fan, has increased the radiating efficiency of radiation fan effectively.Though the thickness B of the utility model fan slightly increases than existing structure, do not increase the height of host computer 20, the extra small low thin requirement of harmless host computer.

Moreover as shown in Figs. 7-9, the utility model also can be designed to be the dome arc with the front end 19 of flabellum body 11, makes the formed turbulent flow area of flabellum body front end less, and air intake can be comparatively smooth and easy, and the noise that flabellum body 11 is produced when rotating also can reduce.

In sum, defective such as the blade area that the utility model has improved existing radiation fan flabellum body widely is little, produce that air quantity is little, heat radiation rate variance, noise are big makes it to become a kind of radiating efficiency height, radiation fan that operating noise is low.

Claims (3)

1, a kind of radiation fan is characterized in that this fan comprises:

A base (10), its inside are installed with an axle core (12);

A flabellum body (11), it is hubbed at the inside of base (10), and this flabellum body (11) is with bearing

Be hubbed on the core (12), flabellum body (11) has a reentrant part (13);

A ring-shaped rotor (14), it is fixedly arranged in the reentrant part (13) of flabellum body (11);

A stator (15), it is arranged in the ring-shaped rotor (14), and this stator (15) is fixed in base

(10) on, and separate setting with bearing (17); With

A circuit board (16), it is fixedly arranged in the base (10), and is connected with stator (15).

2, radiation fan as claimed in claim 1 is characterized in that: the front end (19) of described flabellum body (11) is circular arc.

3, radiation fan as claimed in claim 1 is characterized in that: described flabellum body (11) is hubbed on the core (12) with two bearings (17).

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